Method append_trusted_len_iter

arrow-buffer/src/builder/mod.rs:324–332

(&mut self, iter: impl IntoIterator<Item = T>)

    /// the iterator implement `TrustedLen` once that is stabilized.
    #[inline]
    pub unsafe fn append_trusted_len_iter(&mut self, iter: impl IntoIterator<Item = T>) {
        let iter = iter.into_iter();
        let len = iter
            .size_hint()
            .1
            .expect("append_trusted_len_iter expects upper bound");
        self.reserve(len);
        self.extend(iter);
    }

    /// Resets this builder and returns an immutable [Buffer].
    ///